Earth has just one natural satellite and that is moon. It is quarter of the size of earth if you consider its diameter but if you consider its mass, you will find that it is 1/81 of the earth. This object we see as one that emits a soft light in the night sky is important to some people due to religious reasons. For others it is a curious object on which a lot of questions were left unanswered until recently.
In order for people to be able to find the answers to the questions that they had about the moon, they had to wait until technology became extremely advanced. This is because science was responsible for making the rockets that people needed to utilize in order to travel to the moon. Since the moon does not have an atmosphere, people also had to wait for special suits to be made that would allow them to be able to survive for the time that they were in space. Between the late 1960's and the early 1970's, both the United States and Russia started planning explorations to the moon.
Both Russia and the United States spent a lot of money in order for them to be able to send people to the moon. It was the job of the astronaut to bring back rock and soil from the moon. Scientists used these samples in order to do studies and learn more about the moon. One of the main questions that scientists wanted to answer about the moon was if there was life on there. However, even though there have been many different studies done, there still has not been an answer to this question.
In the year 1990, Japan sent its first spacecraft into orbit heading towards the moon. There were not any questions answered by this exploration because the probe that was sent up into orbit malfunctioned. Europeans sent spacecraft into orbit as well, and they were able to find that there is water on the moon that formed ice in the craters.
Even though scientists are still actively studying the moon, there have been many questions that were answered about it. For example, we can figure that the moon first came into existence about f.5 billion years ago. The craters on the surface of the moon include areas where it was hit with meteors millions of years ago. Since the moon does not have any weather, the craters and footprints that have been made will not change for years to come.
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